Actually, it DOES work in Chrome, and the solution is really silly!!

Both the parent and the element onto which you want to control page-breaking must be declared as:

position: relative;

Check out this fiddle (or in fullscreen)

This is true for:

page-break-before
page-break-after
page-break-inside

However, controlling page-break-inside in Safari does not work (in 5.1.7, at least)

I hope this helps!!!